For me it's probably Ghidra or Jetbrains IDEA in 2023. Both are desktop, thought I could see the debate on whether or not developers are considered mainstream consumers. I use them on Linux and Windows, so I definitely get value out of their cross platform capabilities.
I use Eclipse-based tools at work (again, I can see the debate). It seems like Samsung's Smarthings (IoT platform) used to use Groovy, but has recently migrated away.
I also know you said desktop, but a weak argument could be made in favor of the (also weak) JVM connections of Android. I'd put forth that some Android usecases are basically former desktop usecases.
I use Eclipse-based tools at work (again, I can see the debate). It seems like Samsung's Smarthings (IoT platform) used to use Groovy, but has recently migrated away.
I also know you said desktop, but a weak argument could be made in favor of the (also weak) JVM connections of Android. I'd put forth that some Android usecases are basically former desktop usecases.